Is there any way to test if my VSS has gone bad? A while back my speedo stopped working (or rather, nothing until 60mph, then LOTS of bouncing). I've replaced the speedometer itself, and the cable (and lubed it), and now I have no movement at all. I know my white drive gear (3.55s out back, T-5z spec rebuild) has some teeth chewed up, but everything I've read indicates that (1) the white gears get chewed up almost immediately, and (2) they will still work while chewed up. No? Before I keep throwing money at this problem, can I test the VSS? Or should I just replace the white gear?